What is the main business of Sandmill?

The main business activity of Sandmill focuses on production of electricity from non-renewable sources.

When was the company founded?

The company was registered in the Polish National Court Register (KRS) on March 28, 2023.

Where is the headquarters located?

The headquarters is located at: Aleja Ks. Józefa Waląga 2, 83-000 Pruszcz Gdański.

Who is on the management board?

The management board consists of: Magdalena Muchalska (Member of the Management Board) and Przemysław Piesiewicz (Member of the Management Board).

What is the share capital?

The share capital of the company is PLN 5,000 (approx. $1,351).

What period do the latest financial data cover?

The latest available financial statement covers the period from January 1, 2025 to December 31, 2025.

How much revenue was generated?

In 2025, the company generated total revenue of $11,794, representing an increase of 113.8% compared to 2024.

No, the company recorded a net loss of $2,522 in 2025. For comparison, in 2024 the loss was $1,525, meaning the company increased its loss by 65.0%.

Sandmillsp. z o.o.

Production of electricity

KRS: NIP: REGON:

Overview

Status

Active

Registry date

2023-03-28

Share capital

5,000.00 PLN

Registered address

Aleja Ks. Józefa Waląga 2, 83-000 Pruszcz Gdański, Poland

Electronic delivery address

AE:PL-39270-33431-ADTSU-19

Financials

Revenue history (in k)

Filing timeliness

Financial statements were filed on time, on average 6 days early.

202514/07/2026
202402/07/2025
202312/07/2024

Filed on timeDelayFiling deadline

Data and insights are generated automatically from financial statements – they may contain errors and are neither a credit assessment nor business advice.

Statistics

How the company ranks by revenue within its industry, region and across Poland in 2025.

Results vs industry

Revenue

This companyUSD 11.79kMedianUSD 9.52kAverageUSD 3.13m

Net profit

This companyUSD -2.52kMedianUSD -6.16kAverageUSD -369.58k

Operating costs

This companyUSD 14.32kMedianUSD 19.84kAverageUSD 3.32m

Assets

This companyUSD 17.89kMedianUSD 435.31kAverageUSD 9.23m

Industry

Production of electricity (35.11.Z)Primary

Authorized Representatives

Magdalena Muchalska – Management Board Member

Przemysław Piesiewicz – Management Board Member

Manner of representation

Each member of the management board is authorized to make declarations on behalf of the company independently.

Ownership

Owner	Shares	Share value	Stake
Magdalena Muchalskaage 29	50	$675.31	50%
Karolina Krystyna Piesiewiczage 51	25	$337.66	25%
Przemysław Piesiewiczage 49	25	$337.66	25%

Karolina Krystyna Piesiewicz and Przemysław Piesiewicz hold a combined 50% – the ownership structure indicates family control.

Beneficial owners

Person	Rights

Debt

No entries in the National Debtors Register (KRZ).

Public aid

No public aid cases recorded in the last 10 years.

Competitors

Name	Revenue	Website
Energetycznisp. z o.o.	$690,151.52	energetyczni.net
SPENsp. z o.o.	$77,549.50	spen.com.pl
Otrzep Solarsp. z o.o.	$39,189.10	pw-global.com
Vento Nerosp. z o.o.	$29,049.32	ventonero.com.pl
Fides Solar Spv 1P.S.A.	$1,381.22	fidessolar.pl
Eneozsp. z o.o.	$1,227.41	eneoz.pl
LETO S7sp. z o.o.	$1.57	eurowind.pl
Pol-Sun Developmentsp. z o.o.	$0.90	pol-sun.pl
Activia Sun Stężycasp. z o.o.	$0.23	activiagroup.eu
Igels Batterysp. z o.o.	$0.13	koniksystem.com